So, the chord sequence is maybe Cmaj / Bbmaj / Fmaj. The Bb is subdominant of the (subdominant of C) Fmaj. It's sort of reverse ii - V - I that jazzers are renowned to use.As actually many, many songs utilise. The Bb chord , in a way, is related to the key of C in a 'first- removed' manner.You're right in that the resolution is in 2 plagal cadences, so it sounds fine.The Hendrix song Hey Joe takes the idea a bit further, in E, but then goes C / G / D / A and back to E. Usually, I've heard it move back the way you describe.Considering Sweet Home Alabama, it could be construed that this song uses the same plan -D /C /G., spawning the old question 'Is it in G or D' Answers on a postcard or this site, please !

So, the chord sequence is maybe Cmaj / Bbmaj / Fmaj. The Bb is subdominant of the (subdominant of C) Fmaj. It's sort of reverse ii - V - I that jazzers are renowned to use.As actually many, many songs utilise. The Bb chord , in a way, is related to the key of C in a 'first- removed' manner.You're right in that the resolution is in 2 plagal cadences, so it sounds fine.The Hendrix song Hey Joe takes the idea a bit further, in E, but then goes C / G / D / A and back to E. Usually, I've heard the sequence move back to tonic chord the way you describe.Considering Sweet Home Alabama, it could be construed that this song uses the same plan -D /C /G., spawning the old question 'Is it in G or D' Answers on a postcard or this site, please !